Chapters1-3. Chapters4-5. Chapters 7-8. Chapter 9. Chapter 10. 1pt. 1 pt. 1 pt. 1pt. 1 pt. 2 pt. 2 pt. 2pt. 2pt. 2 pt. 3 pt. 3 pt. 3 pt. 3 pt. 3 pt. 4 pt. 4 pt. 4pt. 4 pt. 4pt. 5pt. 5 pt. 5 pt. 5 pt. 5 pt.
What is the percent yield of the reaction if 9.9g 2Pb(No3)2 are heated to giver 5.5g of PbO?
2Pb(NO3)2(s) @PbO(s) + O2(g)
12.7g Cu produced 38.1 g Ag. What is the percent yield of sliver in this reaction? Cu+2AgNO3Cu(NO3)+ 2Ag
According to the kinetic theory, collisions between molecules in a gas ____.
A) are perfectly elastic
B) are inelastic
C) never occur
D) cause a loss of total kinetic energy
The particles of a gas move independently of each other.
The particles in a gas move rapidly.
The particles in a gas are relatively far apart.
all of the above
Which of the following statement is not true, according to the kinetic theory?
There is not attraction between particles of gas.
Only particles of matter in the gaseous state are in constant motion
The particles of a gas collide wit each other and with other objects
All of the statements are true
What is Only particles of matter in the gaseous state are in constant motion.
0 K and 101.3 kPa
0 K and 1 kPa
0 C and 101.3 kPa
0 C and 1 kPa
The walls of the container
The vacuum maintained in the container
The simultaneous collisions of fast-moving particles in the container
Atmospheric pressure acting on the outside walls of the container
What is the simultaneous collisions of fast-moving particles in the container
With which temperature scale is temperature directly proportional to average kinetic energy?
B) PV = nR
C) PV = nRT
D) P = nRT
Which law can be used to calculate the number of moles of a contained gas?
combined gas law
ideal gas law
What happens to the partial pressure of oxygen in a sample of air if the temperature is increased?
It stays the same
the change cannot be determined
Which of the following atoms would have the greatest velocity if each atom had the same kinetic energy ?
Which of the following gases is the best choice for inflating a balloon that must remain inflated for a long period of time?
A) dispersion forces
B) covalent bonding
C) hydrogen bonding
D) ionic attractions
C) trigonal planer
Which of the following is primarily responsible for holding water molecules together in the liquid states.
Polar covalent bonds
Is the inward force which tends to minimize the surface area of liquid
may be increased by detergents
Is decreased by hydrogen bonding
causes beads of water to spread out.
What is the inward force which tends to minimize the surface area of liquid
The fact that ice is less dense than water is related to the fact that ___?
A) the molecular structure of ice is much less orderly than that of waterB) the molecules of ice are held to each other by covalent bonding
C) ice has a molecular structure in which water molecules are arranged randomly
D) ice has a molecular structure that is an open framework held together by hydrogen bonds
What is the molecular structure of ice is much less orderly than that of water
What is the number of Kg of solvent in a molar solution containing 5.0 grams of solute? (Molar mass = 30g)
To which of the following variables is change in a boiling point directly proportional?
Morality of solution
molality of solution
percent by volume of solution
percent (mass/mass) of solution
What is the freezing point of a solution of 0.5 mol of LiBr in 500 mL of water? (Kf=1.86 C/m)
What is the molality of a solution of water and KCL if the freezing point of the solution is -3 C? (Kf=1.86 C/m; molar mass of water =18 g)